package  utils{
	/**
	 * @author SXL
	 * @date 2013-11-04 17:18
	 */
	import flash.utils.ByteArray;
 
	public class ChineseConvert
	{  
	    /**
	     * 获取一串中文的拼音字母
	     * @param chinese <string>Unicode格式的中文字符串
	     * @return   <string>拼音声母字符串
	     * @example
	     * var chinese:String = "中华人民共和国";
	     * var py:String = Convert.convertString(chinese);
	     * trace(py); //zhrmghg
	     */
		public static function convertString(chinese:String):String
		{
			var len:int = chinese.length;
		    var ret:String = "";
		    for (var i:int = 0; i < len; i++)
		    {
				ret += convertChar(chinese.charAt(i));
		    }
		    return ret;
	    }
  
	    /**
	     *
	     * @param char <String>Unicode格式的一个中文字符
	     * @return   <String>中文字符的声母
	     * @example
	     * var chineseChar:String = "我";
	     * var py:String = Convert.convertChar(chineseChar);
	     * trace(py); //w
	     */
	    public static function convertChar(chineseChar:String):String
	    {
		    var bytes:ByteArray = new ByteArray();
		    bytes.writeMultiByte(chineseChar.charAt(0), "cn-gb");
		    var n:int = bytes[0] << 8;
		    n += bytes[1];
		    if (isIn(0xB0A1, 0xB0C4, n)) return "a";
		    if (isIn(0XB0C5, 0XB2C0, n)) return "b";
		    if (isIn(0xB2C1, 0xB4ED, n)) return "c";
  		    if (isIn(0xB4EE, 0xB6E9, n)) return "d";
  		    if (isIn(0xB6EA, 0xB7A1, n)) return "e";
		    if (isIn(0xB7A2, 0xB8c0, n)) return "f";
		    if (isIn(0xB8C1, 0xB9FD, n)) return "g";
		    if (isIn(0xB9FE, 0xBBF6, n)) return "h";
		    if (isIn(0xBBF7, 0xBFA5, n)) return "j";
		    if (isIn(0xBFA6, 0xC0AB, n)) return "k";
		    if (isIn(0xC0AC, 0xC2E7, n)) return "l";
		    if (isIn(0xC2E8, 0xC4C2, n)) return "m";
		    if (isIn(0xC4C3, 0xC5B5, n)) return "n";
		    if (isIn(0xC5B6, 0xC5BD, n)) return "o";
		    if (isIn(0xC5BE, 0xC6D9, n)) return "p";
		    if (isIn(0xC6DA, 0xC8BA, n)) return "q";
		    if (isIn(0xC8BB, 0xC8F5, n)) return "r";
		    if (isIn(0xC8F6, 0xCBF0, n)) return "s";
		    if (isIn(0xCBFA, 0xCDD9, n)) return "t";
		    if (isIn(0xCDDA, 0xCEF3, n)) return "w";
		    if (isIn(0xCEF4, 0xD188, n)) return "x";
		    if (isIn(0xD1B9, 0xD4D0, n)) return "y";
		    if (isIn(0xD4D1, 0xD7F9, n)) return "z";
		    return "\0";
	    }
	  
		private static function isIn(from:int, to:int, value:int):Boolean
		{ 
			return ((value >= from) && (value <= to));
		}
	  
	  /**
	   *
	   * @param chineseChar <String>Unicode格式的一个中文字符
	   * @return    <Boolean>是中文返回true,不是返回flase
	   */
		public static function isChinese(chineseChar:String):Boolean{
			if (convertChar(chineseChar) == "\0")
			{
				return false;
			}
			return true;
		}
	}
}